Alexandre Savard | 1b09e31 | 2012-08-07 20:33:29 -0400 | [diff] [blame] | 1 | /* v3_akey.c */ |
| 2 | /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL |
| 3 | * project 1999. |
| 4 | */ |
| 5 | /* ==================================================================== |
| 6 | * Copyright (c) 1999 The OpenSSL Project. All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * |
| 12 | * 1. Redistributions of source code must retain the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer. |
| 14 | * |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in |
| 17 | * the documentation and/or other materials provided with the |
| 18 | * distribution. |
| 19 | * |
| 20 | * 3. All advertising materials mentioning features or use of this |
| 21 | * software must display the following acknowledgment: |
| 22 | * "This product includes software developed by the OpenSSL Project |
| 23 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" |
| 24 | * |
| 25 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to |
| 26 | * endorse or promote products derived from this software without |
| 27 | * prior written permission. For written permission, please contact |
| 28 | * licensing@OpenSSL.org. |
| 29 | * |
| 30 | * 5. Products derived from this software may not be called "OpenSSL" |
| 31 | * nor may "OpenSSL" appear in their names without prior written |
| 32 | * permission of the OpenSSL Project. |
| 33 | * |
| 34 | * 6. Redistributions of any form whatsoever must retain the following |
| 35 | * acknowledgment: |
| 36 | * "This product includes software developed by the OpenSSL Project |
| 37 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" |
| 38 | * |
| 39 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY |
| 40 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 42 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR |
| 43 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 45 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 46 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
| 50 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
| 51 | * ==================================================================== |
| 52 | * |
| 53 | * This product includes cryptographic software written by Eric Young |
| 54 | * (eay@cryptsoft.com). This product includes software written by Tim |
| 55 | * Hudson (tjh@cryptsoft.com). |
| 56 | * |
| 57 | */ |
| 58 | |
| 59 | #include <stdio.h> |
| 60 | #include "cryptlib.h" |
| 61 | #include <openssl/conf.h> |
| 62 | #include <openssl/asn1.h> |
| 63 | #include <openssl/asn1t.h> |
| 64 | #include <openssl/x509v3.h> |
| 65 | |
| 66 | static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, |
| 67 | AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist); |
| 68 | static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, |
| 69 | X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values); |
| 70 | |
| 71 | const X509V3_EXT_METHOD v3_akey_id = |
| 72 | { |
| 73 | NID_authority_key_identifier, |
| 74 | X509V3_EXT_MULTILINE, ASN1_ITEM_ref(AUTHORITY_KEYID), |
| 75 | 0,0,0,0, |
| 76 | 0,0, |
| 77 | (X509V3_EXT_I2V)i2v_AUTHORITY_KEYID, |
| 78 | (X509V3_EXT_V2I)v2i_AUTHORITY_KEYID, |
| 79 | 0,0, |
| 80 | NULL |
| 81 | }; |
| 82 | |
| 83 | static STACK_OF(CONF_VALUE) *i2v_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, |
| 84 | AUTHORITY_KEYID *akeyid, STACK_OF(CONF_VALUE) *extlist) |
| 85 | { |
| 86 | char *tmp; |
| 87 | if(akeyid->keyid) { |
| 88 | tmp = hex_to_string(akeyid->keyid->data, akeyid->keyid->length); |
| 89 | X509V3_add_value("keyid", tmp, &extlist); |
| 90 | OPENSSL_free(tmp); |
| 91 | } |
| 92 | if(akeyid->issuer) |
| 93 | extlist = i2v_GENERAL_NAMES(NULL, akeyid->issuer, extlist); |
| 94 | if(akeyid->serial) { |
| 95 | tmp = hex_to_string(akeyid->serial->data, |
| 96 | akeyid->serial->length); |
| 97 | X509V3_add_value("serial", tmp, &extlist); |
| 98 | OPENSSL_free(tmp); |
| 99 | } |
| 100 | return extlist; |
| 101 | } |
| 102 | |
| 103 | /* Currently two options: |
| 104 | * keyid: use the issuers subject keyid, the value 'always' means its is |
| 105 | * an error if the issuer certificate doesn't have a key id. |
| 106 | * issuer: use the issuers cert issuer and serial number. The default is |
| 107 | * to only use this if keyid is not present. With the option 'always' |
| 108 | * this is always included. |
| 109 | */ |
| 110 | |
| 111 | static AUTHORITY_KEYID *v2i_AUTHORITY_KEYID(X509V3_EXT_METHOD *method, |
| 112 | X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values) |
| 113 | { |
| 114 | char keyid=0, issuer=0; |
| 115 | int i; |
| 116 | CONF_VALUE *cnf; |
| 117 | ASN1_OCTET_STRING *ikeyid = NULL; |
| 118 | X509_NAME *isname = NULL; |
| 119 | GENERAL_NAMES * gens = NULL; |
| 120 | GENERAL_NAME *gen = NULL; |
| 121 | ASN1_INTEGER *serial = NULL; |
| 122 | X509_EXTENSION *ext; |
| 123 | X509 *cert; |
| 124 | AUTHORITY_KEYID *akeyid; |
| 125 | |
| 126 | for(i = 0; i < sk_CONF_VALUE_num(values); i++) |
| 127 | { |
| 128 | cnf = sk_CONF_VALUE_value(values, i); |
| 129 | if(!strcmp(cnf->name, "keyid")) |
| 130 | { |
| 131 | keyid = 1; |
| 132 | if(cnf->value && !strcmp(cnf->value, "always")) |
| 133 | keyid = 2; |
| 134 | } |
| 135 | else if(!strcmp(cnf->name, "issuer")) |
| 136 | { |
| 137 | issuer = 1; |
| 138 | if(cnf->value && !strcmp(cnf->value, "always")) |
| 139 | issuer = 2; |
| 140 | } |
| 141 | else |
| 142 | { |
| 143 | X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNKNOWN_OPTION); |
| 144 | ERR_add_error_data(2, "name=", cnf->name); |
| 145 | return NULL; |
| 146 | } |
| 147 | } |
| 148 | |
| 149 | if(!ctx || !ctx->issuer_cert) |
| 150 | { |
| 151 | if(ctx && (ctx->flags==CTX_TEST)) |
| 152 | return AUTHORITY_KEYID_new(); |
| 153 | X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_NO_ISSUER_CERTIFICATE); |
| 154 | return NULL; |
| 155 | } |
| 156 | |
| 157 | cert = ctx->issuer_cert; |
| 158 | |
| 159 | if(keyid) |
| 160 | { |
| 161 | i = X509_get_ext_by_NID(cert, NID_subject_key_identifier, -1); |
| 162 | if((i >= 0) && (ext = X509_get_ext(cert, i))) |
| 163 | ikeyid = X509V3_EXT_d2i(ext); |
| 164 | if(keyid==2 && !ikeyid) |
| 165 | { |
| 166 | X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_KEYID); |
| 167 | return NULL; |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | if((issuer && !ikeyid) || (issuer == 2)) |
| 172 | { |
| 173 | isname = X509_NAME_dup(X509_get_issuer_name(cert)); |
| 174 | serial = M_ASN1_INTEGER_dup(X509_get_serialNumber(cert)); |
| 175 | if(!isname || !serial) |
| 176 | { |
| 177 | X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,X509V3_R_UNABLE_TO_GET_ISSUER_DETAILS); |
| 178 | goto err; |
| 179 | } |
| 180 | } |
| 181 | |
| 182 | if(!(akeyid = AUTHORITY_KEYID_new())) goto err; |
| 183 | |
| 184 | if(isname) |
| 185 | { |
| 186 | if(!(gens = sk_GENERAL_NAME_new_null()) |
| 187 | || !(gen = GENERAL_NAME_new()) |
| 188 | || !sk_GENERAL_NAME_push(gens, gen)) |
| 189 | { |
| 190 | X509V3err(X509V3_F_V2I_AUTHORITY_KEYID,ERR_R_MALLOC_FAILURE); |
| 191 | goto err; |
| 192 | } |
| 193 | gen->type = GEN_DIRNAME; |
| 194 | gen->d.dirn = isname; |
| 195 | } |
| 196 | |
| 197 | akeyid->issuer = gens; |
| 198 | akeyid->serial = serial; |
| 199 | akeyid->keyid = ikeyid; |
| 200 | |
| 201 | return akeyid; |
| 202 | |
| 203 | err: |
| 204 | X509_NAME_free(isname); |
| 205 | M_ASN1_INTEGER_free(serial); |
| 206 | M_ASN1_OCTET_STRING_free(ikeyid); |
| 207 | return NULL; |
| 208 | } |